The fuel mix for a 1979 85hp Johnson Seahorse outboard motor typically requires a 50:1 ratio of fuel to oil. This means you should use 2.6 ounces of oil per gallon of gasoline. It's important to use a good quality two-stroke oil designed for outboard motors to ensure optimal performance and engine longevity. Always refer to the owner’s manual for specific recommendations and adjustments based on your usage.
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